I have an EC2 Ubuntu 18.04.3 LTS instance with python 3.6.9 I tried to install pyarrow with this command: But I get an error: Reading the first messages after trying to install yarrow I see this: Please, do you know how I can solve this issue? Thank you in advance. Answer If you are working in a virtual envir…
Find minimum difference between two vectors with numba
I’ve tried to optimize searching for minimum value between two numpy vectors with numba. There is speed up and result is correct until I use prange and parallel=True option. I understand that the issue is in sharing variables min_val, tmp, min_val_idx_a, min_val_idx_b during parallel execution (maybe wi…
One Dataset causes “`IndexError: list index out of range“` while other runs perfectly
My Dataset In numpy array np.shape(data) -> (6989, 4) stats.describe(data) -> DescribeResult(nobs=6989, minmax=(array([0., 0., 0., 0.]), array([ 299.99, 86785. , 10997. , 13222. ])), mean=array([ 12.47994992, 3407.00243239, 27.23293747, 109.72370869]), variance=array([1.42652452e+02, 4.71755188e+07, 6.1…
Python calculated Timedelta 50 years in future, should be same day
This is a follow up to Calculating new column value in dataframe based on next rows column value The solution in the previous question worked for a column holding hh:mm:ss values as a string. I tried applying (no pun intended) the same logic to calculate the 1 second difference on a column of pandas Timestamp…
django.db.utils.OperationalError: no such function: JSON_VALID
I literally don’t know how to deal with it and how it is happening I am getting this error when I run python manage.py migrate, migrations were without an error. Mycode models.py views.py full command line error If you are able to solve the issue then answer and along with it also tell me any issue in m…
Python Group Repeated Values in List in a Sublist
I need to append some repeated values from a list into a sublist, let me explain with an example: I have a variable called array that contains strings of uppercase letters and $ symbols. My end goal is to have this array: As in the example, I need to group all $ symbols that are togheter into sublist in the
Name Entity Recognition (NER) for multiple languages
I am writing some code to perform Named Entity Recognition (NER), which is coming along quite nicely for English texts. However, I would like to be able to apply NER to any language. To do this, I would like to 1) identify the language of a text, and then 2) apply the NER for the identified language. For step…
Google Earth scraping using python selenium
I want to create a web scraper for earth.google.com/web. Whenever the user clicks while holding shift button, the script will print the coordinates which are displayed at the bottom right corner of the google earth web page. I am using selenium with chromedriver but it cannot find the coordinates web element.…
Pandas deleting rows based on same sting in columns
Hello i am using pandas DataFrame to clean this file and want to delete rows which contains the manufacturers name in the buy-box seller column. For example row 1 will be deleted because it contains the string ‘Goli’ in Buy-Box seller Column. Answer There are misisng values so first replace them b…
count of unique data in one column of list of lists
I have got list of lists, have to count number of unique values in one of the columns from that list. I have got only to the point to extract that one column from the list by using the following how can I now count unique data in that column? Answer Use set to find unique elements OR